Klein Tools ET310 Digital Circuit Breaker Finder with GFCI Outlet TesterThe Klein Tools ET310 Circuit Breaker Finder with Integrated GFCI Outlet Tester is a digital circuit breaker finder used to locate the correct circuit breaker in a panel to which an electrical outlet or fixture is connected. The Transmitter is connected to the electrical outlet or fixture in the circuit while the receiver is used to scan the breakers in the circuit panel. The Transmitter also features a GFCI outlet tester.This circuit breaker finder can quickly and accurately locate the correct circuit breaker in a panel corresponding to the circuit to which an electrical outlet or fixture is connectedTester consists of two parts: a Transmitter, connected to the electrical outlet or fixture and a Receiver, used to scan the panel to locate the correct breakerReceiver delivers clear visual and audible indications when the correct breaker has been locatedOperates on 90-120V AC circuitsTransmitter incorporates a GFCI outlet tester to inspect the wiring condition at the electrical outlet and test GFCI devicesTransmitter docks in the Receiver for convenient storage as a single item when tester is not is useTransmitter incorporates a three-pin plug for connecting to North-American-style grounded electrical outlets.The transmitter may be connected to other electrical fixtures using optional accessories which are sold separately (Cat. No. 69411)Receiver powers off automatically after approximately three minutes of non-use to conserve battery lifeTransmitter is powered by the circuit when connected to the electrical outlet or fixtureLow battery indicatorEasily accessible battery compartment. Uses one 9V battery in receiver only; Transmitter does not require a batteryBuilt to withstand a 6.6-Foot (2 m) dropCAT II 120V safety ratingMeasurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installationIncludes Transmitter, Receiver, user manual, and 9V battery (for Receiver)